Classical versus quantum information

  • Thread starter nomadreid
  • Start date


Gold Member
I am a little confused at the description of quantum information, even though I more or less understand the concept of a qubit as being a superposition. That which confused me was a phrase saying that the quantum information is the classical information that can be retrieved. But one can only retrieve classical information in whole units of bits. On the other hand, using the Shannon definition, one can come up with an amount of information which is not a whole number of bits. In other words, can we say that there is, for example 1.5 bits of quantum information?


Gold Member
Not much. I assume the answer to my explicit question is "yes", as I see that non-integer amounts of information come up in Chapter 11 of Nielsen & Chuang (Quantum Computation and Quantum Information), but this leaves the phrase "amount of classical information" a poor choice of words.

Want to reply to this thread?

"Classical versus quantum information" You must log in or register to reply here.

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Hot Threads